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SEGMENT INFORMATION (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($) item
SEGMENT INFORMATION |  |  |
Number of principal reportable business segments | item | 2 | 2 | 2
Revenues and gross profit generated from each segment |  |  |
Net revenues | $ 3,744,512 | $ 3,390,393 | $ 2,853,078
Cost of revenues | 2,969,430 | 2,752,795 | 2,435,890
Gross profit | 775,082 | 637,598 | 417,188
Income from operations | 364,657 | 269,345 | 93,164
Operating segment | Module |  |  |
Revenues and gross profit generated from each segment |  |  |
Net revenues | 2,413,889 | 2,850,859 | 2,825,270
Cost of revenues | 1,923,131 | 2,390,686 | 2,429,207
Gross profit | 490,758 | 460,173 | 396,063
Income from operations | 141,609 | 136,419 | 115,579
Operating segment | Energy |  |  |
Revenues and gross profit generated from each segment |  |  |
Net revenues | 1,575,594 | 677,470 | 106,432
Cost of revenues | 1,302,779 | 473,453 | 66,955
Gross profit | 272,815 | 204,017 | 39,477
Income from operations | 211,539 | 159,518 | (4,063)
Eliminations |  |  |
Revenues and gross profit generated from each segment |  |  |
Net revenues | (244,971) | (137,936) | (78,624)
Cost of revenues | (256,480) | (111,344) | (60,272)
Gross profit | 11,509 | (26,592) | (18,352)
Income from operations | $ 11,509 | $ (26,592) | $ (18,352)

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